past first ladies from laura bush to hillary clinton and nancy reagan assumed more prominent roles on the world stage. >> some first ladies do tend to take on more global roles in a second term. [ laughter ] >> reporter: for now, she certainly seems to have found her groove. for "today," kristen welker, nbc news, the white house. >> and jimmy fallon found his groove, too. >>> still to come next, a little boy calls 911 to complain about his bedtime. got more than he bargained for. that's after these messages. one. two. three. my credit card rewards are easy to remember with the bankamericard cash rewards credit card. earn 1% cash back everywhere, every time. [ both ] 2% back on groceries. [ all ] 3% on gas. no hoops to jump through. i earn more cash back on the things i buy the most. [ woman ] it's as easy as... one! -two. -[ all ] three! [ male announcer ] the bankamericard cash rewards credit card. apply online or at a bank of america near you. he doesn't look like a heart attack patient. i was teaching a martial arts class and it hit me. we get to the emergency room... and then...an